Simply use OpenDNS,
Block all these adress :
ALWAYS BLOCK:
a01.cdn.update.playstation.org.edgesuite.net
a192.d.akamai.net
al02.cdn.update.playstation.net
api-p014.ribob01.net
apicdn-p014.ribob01.net
artcdnsecure.ribob01.net
asm.np.community.playstation.net
deu01.ps4.update.playstation.net
djp01.ps4.update.playstation.net
duk01.ps4.update.playstation.net
dus01.ps4.update.playstation.net
feu01.ps4.update.playstation.net
fuk01.ps4.update.playstation.net
fus01.ps4.update.playstation.net
get.net.playstation.net
playstation.sony.akadns.net
post.net.playstation.net
ps4-eb.ww.np.dl.playstation.net
ps4.updptl.sp-int.community.playstation.net
ps4updptl.eu.np.community.playstation.net
ps4updptl.jp.sp-int.community.playstation.net
sf.api.np.km.playstation.net
t-prof.np.community.playstation.net
themis.dl.playstation.net
tmdb.np.dl.playstation.net
Set DNS
208.67.222.222 and
208.67.220.220 in your PS4 Ethenet or Wifi connection.
Make sure to update your ip to openDNS servers with OpenDNS Updater with a PC.
Each time you will try to update or the PS4 try to find a update you will get a error message
.